What is the pressure?
What is formulae of pressure?
What is the SI unit of pressure?
What is fluid pressure?
What is atmospheric pressure?
How can we measure pressure?
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2. What is a pressure in science?
Pressure is the force per unit area.
The basic formula for pressure is F/A
(Force per unit area).
SI unit of pressure is pascal
3. Formula of pressure
a. Pressure =force / Area
b. P ~ F
c. P ~ 1/A
Pa = N/m2
4. 1. Pressure depends on the amount of force.
2. Pressure depends on the area over which
the force is applied.
Variation of pressure
5. Fluid pressure
The pressure exerted by a fluid, directly
proportional to the specific gravity at any point
and to the height of the fluid above the point.
Since a fluid has no definite shape, its pressure
applies in all directions.
6. Measuring pressure
Open tube manometer
Pressure is measured
by pressure gauge .
It's simplest type is
the open tube
manometer.
This U-shaped tube
containing liquid for
measuring pressure .
7. We have two cases when it comes to the
application of pressure in daily life
Case 1:- Small area resulting in greater
pressure
Case 2:- Large area resulting in smaller
pressure
Applications of pressure
8.
9.
10.
11. Atmospheric pressure
Atmospheric pressure is the force exerted on an
object by the weight of the atmosphere above it.
Atmospheric pressure is commonly measured
with a barometer.
12. Pressure on Earth varies with the altitude of the
surface; so air pressure on mountains is usually
lower than air pressure at sea level. As altitude
increases, atmospheric pressure decreases.
Variation of pressure
